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प्रश्न
Name two elements in Alkaline earth metals.
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उत्तर
Calcium and magnesium.
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संबंधित प्रश्न
State how the valency of elements varies in a period of the periodic table?
What is the fundamental difference in the electron configurations between the group 1 and group 2 elements?
Explain why, the first period of the periodic table has only two elements whereas second period has eight elements
What is a group in the periodic table?
Name an alkali metal in period 3 and halogen in period 2.
Write a short note.
Structure of the modern periodic table.
Two elements P and Q belong to the same period of the modern periodic table and are in group 1 and group 2, respectively. Compare the following characteristics in the tabular form.
- Number of electrons in their atoms
- Their tendency to lose electrons
- Their metallic characters
- Formation of their oxides
- Formulae of their chlorides
Name the following:
The group of the Modern Periodic Table to which calcium [Ca2+] belongs.
Position of A, B and C three elements is given in the table from the modern periodic table. Answer the following questions.
| Periods | Group 2 | Group 17 |
| 2 | ----- | A |
| 3 | B | ----- |
| 4 | ----- | C |
- What is an element metal or nonmetal?
- Which is the outermost orbit of element B?
- Identify C element and it's physical state.
How does the property vary in periods and in groups?
